Strengthened by CFRP company Guang'an

 Technical Lo Tel: 159-0066-1030 including carbon fiber reinforced carbon fiber and carbon fiber reinforced STRENGTHENED two kinds. Carbon fiber materials for repair of reinforced concrete structure began 80 years the United States, Japan and other developed countries. Of this technology started late, but with the rapid development of China's economic construction, and transportation infrastructure, a significant portion of the existing building was designed because the low load standard historical issues caused some changes in the function of the building due to the use, difficult to meet The current specification demands the use of the urgent need for repair, reinforcement. There are many commonly used reinforcement methods, such as: increasing section method, enclosing Steel Reinforcement, bonded steel reinforcement method, carbon fiber reinforcement method. Carbon fiber reinforced repair structure technology is the second increase concrete section, a new type of structure steel reinforcement technology sticky after. Characteristics of carbon fiber material increase compared with traditional concrete section or bonded steel concrete reinforcement, space-saving, simple construction, does not require a fixed-site facilities, easy to guarantee the quality of construction, substantial increase in the structure size and weight, corrosion resistance, durability good. In addition, using this construction method can greatly improve the life of the building, reducing the cost of reinforcement. Thus, carbon fibers as a reinforcing material landmark, has become widely accepted and attention. (1) high tensile strength, is 7-10 times the same cross-section steel. (2) Light weight, density is only 1/4 of ordinary steel. (3) durability, corrosion and harsh environments can impedance, climate change destroy the chemical. (4) construction of convenient, time-saving section, easy to guarantee the quality of construction. (5) for a wide range of concrete structures, steel structures, wooden structures can be reinforced. Can greatly improve the member carrying capacity, seismic performance and durability. Scope carbon fiber reinforcement method can be used for concrete structures bending and shear reinforcement, while widely used in various industrial and civil buildings, structures shock, cracking, corrosion of reinforcement. · Concrete structures, beam bridges and buildings, column, panel reinforcement. · Tunnels, harbor facilities, chimneys, warehouses, factories reinforcement. · By salt damage protection and reinforced concrete structures of bridges and river. The high tensile strength of the process principle of carbon fiber with epoxy prepreg become composite reinforcement (unidirectional continuous fiber); tension direction or the direction perpendicular to the fracture attached to reinforced structural epoxy adhesive along on the formation of a new complex, the reinforcing material with the original pasted together by reinforced concrete crack or shear force increases capacity of the structure, improve the strength, stiffness, crack resistance and elongation. Process Process can be summarized as: the construction preparation of concrete surface treatment surface defects surface brushing primer component repair CFRP configure the underlying surface maintenance leveling material or resin formulated resin-impregnated concrete surface preparation processing operation points 1. 1 incomplete concrete structures surface , damaged part removed. 2 pairs after tick chisel, clean up and missing parts components exposed tendons, repair, restoration. 3 Crack Repair: Aperture cracks less than 0.2mm, and brushing the surface with epoxy resin seal; cracks greater than 0.2mm pouring with epoxy. 4 grinding: the component surface projection (transfer of parts of concrete structures, then hew templates, etc.) polished smooth surface of the component after the repair smooth as possible. Polished surface of the component 5 clean, and sufficiently dry. 2. The defect site with a good brushing primer primer (binder), even with brushing the concrete surface at the defect site. 3. repair with epoxy putty repair surface defects on the surface of the component surface defects surface member is a very important step, points are as follows: 1 putty main agent, curing catalyst into, curing agent according to a predetermined ratio accurately weighed, into the container with a blender and mix well. 2 members dishing site filled with epoxy putty to repair to the surface roughness. When using epoxy putty in incomplete repair, to the temperature above -5 ℃, relative humidity less than 85% for construction. After Putty Scraping the surface roughening irregularities still exist, should then sanded smooth. 4. brushing primer with a good primer (binder), even with a roller brush to require bonded concrete surface. 5. Before CFRP CFRP material, you should first confirm the paste surface is dry. Temperature above -10 ℃, relative humidity RH> 85%, if no effective measures are not construction. To prevent damage to the carbon fiber, carbon fiber materials transportation, storage, cutting and pasting process. The steel ruler and wallpaper knife cut a predetermined size carbon fiber material, each length is generally not more than 6m appropriate. In order to prevent material damage in the storage process, cutting the amount of material shall be subject to the same day the amount of crop. Carbon fiber longitudinal joints must overlap at least 20cm. The parts should be painted resin, carbon fiber lateral overlap is not required. Its construction elements process is as follows: a paste resin main agent, a curing agent and a curing agent urged the proportion should be required to accurately weighed, into the container, blender and mix well. Reconcile the amount of time should be spent within the available time prevail. 2 paste between carbon fiber and resin try not to have air. Available Rolla (special tools) along the fiber direction rolled several times in the carbon fiber material, immersing the resin infiltration of carbon fiber. 6. After curing CFRP material, nature conservation need 1-2 hours to reach initial cure should ensure free from outside interference and collisions during curing. 7. If the reinforcement member needs painting fire, the fire-resistant coating can be painted after the resin is cured. After the initial resin coating should be cured, and should comply with the relevant standards and regulations used in construction paints. Machinery equipment, mainly machine with abrasive cutter, grinder, brush, etc., usually in 2 to 4 to meet project requirements. Carbon Fiber Cloth technical parameters Model intensity level Weight (g / m2) theoretical thickness (mm) Tensile strength (MPa) elastic modulus (GPa) Elongation (%) LQ-Ⅰ-200 high-strength grade Ⅰ 2000.111≥3400≥ 240≥1.7 LQ-Ⅰ-300 high-strength grade Ⅰ 3000.167≥3400≥240≥1.7 LQ-Ⅱ-200 Ⅱ high-strength grade 2000.111≥3000≥210≥1.5 LQ-Ⅱ-300 Ⅱ high-strength carbon fiber reinforced grade 3000.167≥3000≥210≥1.5 Concrete Crack technology for independence through the crack width is greater than 0.2mm, the use of pressure perfusion structural adhesive method is reinforced, while the tension along the vertical direction or the direction of CFRP in the cracks in the reinforced structure to form a new compound body, the reinforcing material with the original pasted together by reinforced concrete crack or shear force increases capacity of the structure, improve the strength, stiffness, crack resistance and elongation. Commonly used in foundation repair the joist can withstand 136 ~ 181kN tension, avoid bending the wall, and 10cm wide carbon-fiber strips acceptable 8-10 times such pressure, as long as the thickness of 3.2mm. Carbon fiber has the following advantages crack repair houses a, light weight, thin, substantially increasing the structural weight and cross-sectional dimensions. b, broad applicability, flexibility, structural members can be used in all types and shapes of reinforcement. c, to facilitate the construction of fast, does not require large-scale equipment, no wet work, no flare, no other fixed measure, not restricted by the shape of the original structure. d, high durability, due not rust, ideal for use in high acid, alkali, salt and atmospheric corrosion in a bad environment. 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